<template>
  <div class="about">
    <div id="myCharts"></div>
  </div>
</template>

<script>
import * as echarts from "echarts";

export default {
  props: {},
  computed: {},
  data() {
    return {
      myChart: null,
    };
  },
  mounted() {
    this.setEcharts();
    window.addEventListener("resize", this.resize);
  },
  methods: {
    setEcharts() {
      // 初始化
      this.myChart = echarts.init(document.getElementById("myCharts"));
      this.myChart.setOption({
        title: {
          text: "ECharts 入门示例",
        },
        tooltip: {},
        xAxis: {
          data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"],
        },
        yAxis: {},
        series: [
          {
            name: "销量",
            type: "bar",
            data: [5, 20, 36, 10, 10, 20],
          },
        ],
      });
    },
    resize() {
      // 屏幕尺寸改变重置echarts
      if (this.myChart) {
        this.myChart.resize();
      }
    },
  },
  beforeDestroy() {
    // 销毁实例
    echarts.dispose(this.myChart);
    this.myChart = null;
  },
  watch: {
    option(val, oldVal) {
      console.log(val, oldVal);
      this.myChart.setOption(val);
    },
  },
};
</script>
<style lang="scss" scoped>
.about {
  width: 100vw;
  height: 70vh;
  #myCharts {
    width: 50%;
    height: 200px;
  }
}
</style>
